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Commit 65085946 authored by Mark Andrews's avatar Mark Andrews
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2162. [func] Allow "rrset-order fixed" to be disabled at compile 

                        time. [RT #16665]
: ----------------------------------------------------------------------
parent edcd4afc
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CHANGES
View file @ 65085946
2162. [func] Allow "rrset-order fixed" to be disabled at compile
time. [RT #16665]
2161. [bug] Fix which log messages are emitted for 'rndc flush'.
[RT #16698]
......
README
View file @ 65085946
......@@ -362,7 +362,7 @@ Building
We've had successful builds and tests on the following systems:
COMPAQ Tru64 UNIX 5.1B
FreeBSD 4.10, 5.2.1
FreeBSD 4.10, 5.2.1, 6.2
HP-UX 11.11
NetBSD 1.5
Slackware Linux 8.1
......@@ -419,6 +419,8 @@ Building
-DDIG_SIGCHASE_BU=1)
Disable dropping queries from particular well known ports.
-DNS_CLIENT_DROPPORT=0
Disable support for "rrset-order fixed".
-DDNS_RDATASET_FIXED=0
LDFLAGS
Linker flags. Defaults to empty string.
......
lib/bind9/check.c
View file @ 65085946
......@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: check.c,v 1.76 2006/08/21 00:11:43 marka Exp $ */
/* $Id: check.c,v 1.77 2007/03/14 05:57:10 marka Exp $ */
/*! \file */
......@@ -46,6 +46,10 @@
#include <bind9/check.h>
#ifndef DNS_RDATASET_FIXED
#define DNS_RDATASET_FIXED 1
#endif
static void
freekey(char *key, unsigned int type, isc_symvalue_t value, void *userarg) {
UNUSED(type);
......@@ -121,8 +125,12 @@ check_orderent(const cfg_obj_t *ent, isc_log_t *logctx) {
cfg_obj_log(ent, logctx, ISC_LOG_ERROR,
"rrset-order: missing ordering");
result = ISC_R_FAILURE;
} else if (strcasecmp(cfg_obj_asstring(obj), "fixed") != 0 &&
strcasecmp(cfg_obj_asstring(obj), "random") != 0 &&
} else if (strcasecmp(cfg_obj_asstring(obj), "fixed") == 0) {
#if !DNS_RDATASET_FIXED
cfg_obj_log(obj, logctx, ISC_LOG_WARNING,
"rrset-order: order 'fixed' not fully implemented");
#endif
} else if (strcasecmp(cfg_obj_asstring(obj), "random") != 0 &&
strcasecmp(cfg_obj_asstring(obj), "cyclic") != 0) {
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
"rrset-order: invalid order '%s'",
......
lib/dns/rbtdb.c
View file @ 65085946
......@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: rbtdb.c,v 1.243 2007/03/12 03:37:21 marka Exp $ */
/* $Id: rbtdb.c,v 1.244 2007/03/14 05:57:10 marka Exp $ */
/*! \file */
......@@ -179,6 +179,10 @@ typedef isc_mutex_t nodelock_t;
#define NODE_WEAKDOWNGRADE(l) ((void)0)
#endif
#ifndef DNS_RDATASET_FIXED
#define DNS_RDATASET_FIXED 1
#endif
/*
* Allow clients with a virtual time of upto 5 minutes in the past to see
* records that would have otherwise have expired.
......@@ -1977,12 +1981,20 @@ valid_glue(rbtdb_search_t *search, dns_name_t *name, rbtdb_rdatatype_t type,
header = search->zonecut_rdataset;
raw = (unsigned char *)header + sizeof(*header);
count = raw[0] * 256 + raw[1];
#if DNS_RDATASET_FIXED
raw += 2 + (4 * count);
#else
raw += 2;
#endif
while (count > 0) {
count--;
size = raw[0] * 256 + raw[1];
#if DNS_RDATASET_FIXED
raw += 4;
#else
raw += 2;
#endif
region.base = raw;
region.length = size;
raw += size;
......@@ -5651,9 +5663,11 @@ rdataset_first(dns_rdataset_t *rdataset) {
return (ISC_R_NOMORE);
}
#if DNS_RDATASET_FIXED
if ((rdataset->attributes & DNS_RDATASETATTR_LOADORDER) == 0)
raw += 2 + (4 * count);
else
#endif
raw += 2;
/*
......@@ -5688,11 +5702,17 @@ rdataset_next(dns_rdataset_t *rdataset) {
* Skip forward one record (length + 4) or one offset (4).
*/
raw = rdataset->private5;
#if DNS_RDATASET_FIXED
if ((rdataset->attributes & DNS_RDATASETATTR_LOADORDER) == 0) {
#endif
length = raw[0] * 256 + raw[1];
raw += length;
#if DNS_RDATASET_FIXED
}
rdataset->private5 = raw + 4;
rdataset->private5 = raw + 4; /* length(2) + order(2) */
#else
rdataset->private5 = raw + 2; /* length(2) */
#endif
return (ISC_R_SUCCESS);
}
......@@ -5700,7 +5720,9 @@ rdataset_next(dns_rdataset_t *rdataset) {
static void
rdataset_current(dns_rdataset_t *rdataset, dns_rdata_t *rdata) {
unsigned char *raw = rdataset->private5; /* RDATASLAB */
#if DNS_RDATASET_FIXED
unsigned int offset;
#endif
isc_region_t r;
REQUIRE(raw != NULL);
......@@ -5709,14 +5731,21 @@ rdataset_current(dns_rdataset_t *rdataset, dns_rdata_t *rdata) {
* Find the start of the record if not already in private5
* then skip the length and order fields.
*/
#if DNS_RDATASET_FIXED
if ((rdataset->attributes & DNS_RDATASETATTR_LOADORDER) != 0) {
offset = (raw[0] << 24) + (raw[1] << 16) +
(raw[2] << 8) + raw[3];
raw = rdataset->private3;
raw += offset;
}
#endif
r.length = raw[0] * 256 + raw[1];
#if DNS_RDATASET_FIXED
raw += 4;
#else
raw += 2;
#endif
r.base = raw;
dns_rdata_fromregion(rdata, rdataset->rdclass, rdataset->type, &r);
}
......
lib/dns/rdataslab.c
View file @ 65085946
......@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: rdataslab.c,v 1.40 2006/03/05 23:58:52 marka Exp $ */
/* $Id: rdataslab.c,v 1.41 2007/03/14 05:57:10 marka Exp $ */
/*! \file */
......@@ -33,6 +33,10 @@
#include <dns/rdataset.h>
#include <dns/rdataslab.h>
#ifndef DNS_RDATASET_FIXED
#define DNS_RDATASET_FIXED 1
#endif
/*
* The rdataslab structure allows iteration to occur in both load order
* and DNSSEC order. The structure is as follows:
......@@ -45,10 +49,19 @@
* order (2 bytes)
* data (data length bytes)
*
* If DNS_RDATASET_FIXED is defined to be zero (0) the format of a
* rdataslab is as follows:
*
* header (reservelen bytes)
* record count (2 bytes)
* data records
* data length (2 bytes)
* data (data length bytes)
*
* Offsets are from the end of the header.
*
* Load order traversal is performed by walking the offset table to find
* the start of the record.
* the start of the record (DNS_RDATASET_FIXED = 1).
*
* DNSSEC order traversal is performed by walking the data records.
*
......@@ -79,6 +92,7 @@ compare_rdata(const void *p1, const void *p2) {
return (dns_rdata_compare(&x1->rdata, &x2->rdata));
}
#if DNS_RDATASET_FIXED
static void
fillin_offsets(unsigned char *offsetbase, unsigned int *offsettable,
unsigned length)
......@@ -108,6 +122,7 @@ fillin_offsets(unsigned char *offsetbase, unsigned int *offsettable,
*raw = j++ & 0xff;
}
}
#endif
isc_result_t
dns_rdataslab_fromrdataset(dns_rdataset_t *rdataset, isc_mem_t *mctx,
......@@ -115,13 +130,17 @@ dns_rdataslab_fromrdataset(dns_rdataset_t *rdataset, isc_mem_t *mctx,
{
struct xrdata *x;
unsigned char *rawbuf;
#if DNS_RDATASET_FIXED
unsigned char *offsetbase;
#endif
unsigned int buflen;
isc_result_t result;
unsigned int nitems;
unsigned int nalloc;
unsigned int i;
#if DNS_RDATASET_FIXED
unsigned int *offsettable;
#endif
buflen = reservelen + 2;
......@@ -147,7 +166,9 @@ dns_rdataslab_fromrdataset(dns_rdataset_t *rdataset, isc_mem_t *mctx,
INSIST(result == ISC_R_SUCCESS);
dns_rdata_init(&x[i].rdata);
dns_rdataset_current(rdataset, &x[i].rdata);
#if DNS_RDATASET_FIXED
x[i].order = i;
#endif
result = dns_rdataset_next(rdataset);
}
if (result != ISC_R_NOMORE)
......@@ -179,20 +200,30 @@ dns_rdataslab_fromrdataset(dns_rdataset_t *rdataset, isc_mem_t *mctx,
if (compare_rdata(&x[i-1].rdata, &x[i].rdata) == 0) {
x[i-1].rdata.data = NULL;
x[i-1].rdata.length = 0;
#if DNS_RDATASET_FIXED
/*
* Preserve the least order so A, B, A -> A, B
* after duplicate removal.
*/
if (x[i-1].order < x[i].order)
x[i].order = x[i-1].order;
#endif
nitems--;
} else
#if DNS_RDATASET_FIXED
buflen += (8 + x[i-1].rdata.length);
#else
buflen += (2 + x[i-1].rdata.length);
#endif
}
/*
* Don't forget the last item!
*/
#if DNS_RDATASET_FIXED
buflen += (8 + x[i-1].rdata.length);
#else
buflen += (2 + x[i-1].rdata.length);
#endif
/*
* Ensure that singleton types are actually singletons.
......@@ -216,6 +247,7 @@ dns_rdataslab_fromrdataset(dns_rdataset_t *rdataset, isc_mem_t *mctx,
goto free_rdatas;
}
#if DNS_RDATASET_FIXED
/* Allocate temporary offset table. */
offsettable = isc_mem_get(mctx, nalloc * sizeof(unsigned int));
if (offsettable == NULL) {
......@@ -224,33 +256,43 @@ dns_rdataslab_fromrdataset(dns_rdataset_t *rdataset, isc_mem_t *mctx,
goto free_rdatas;
}
memset(offsettable, 0, nalloc * sizeof(unsigned int));
#endif
region->base = rawbuf;
region->length = buflen;
rawbuf += reservelen;
#if DNS_RDATASET_FIXED
offsetbase = rawbuf;
#endif
*rawbuf++ = (nitems & 0xff00) >> 8;
*rawbuf++ = (nitems & 0x00ff);
#if DNS_RDATASET_FIXED
/* Skip load order table. Filled in later. */
rawbuf += nitems * 4;
#endif
for (i = 0; i < nalloc; i++) {
if (x[i].rdata.data == NULL)
continue;
#if DNS_RDATASET_FIXED
offsettable[x[i].order] = rawbuf - offsetbase;
#endif
*rawbuf++ = (x[i].rdata.length & 0xff00) >> 8;
*rawbuf++ = (x[i].rdata.length & 0x00ff);
#if DNS_RDATASET_FIXED
rawbuf += 2; /* filled in later */
#endif
memcpy(rawbuf, x[i].rdata.data, x[i].rdata.length);
rawbuf += x[i].rdata.length;
}
#if DNS_RDATASET_FIXED
fillin_offsets(offsetbase, offsettable, nalloc);
isc_mem_put(mctx, offsettable, nalloc * sizeof(unsigned int));
#endif
result = ISC_R_SUCCESS;
......@@ -274,7 +316,11 @@ rdataset_first(dns_rdataset_t *rdataset) {
rdataset->private5 = NULL;
return (ISC_R_NOMORE);
}
#if DNS_RDATASET_FIXED
raw += 2 + (4 * count);
#else
raw += 2;
#endif
/*
* The privateuint4 field is the number of rdata beyond the cursor
* position, so we decrement the total count by one before storing
......@@ -300,7 +346,11 @@ rdataset_next(dns_rdataset_t *rdataset) {
rdataset->privateuint4 = count;
raw = rdataset->private5;
length = raw[0] * 256 + raw[1];
#if DNS_RDATASET_FIXED
raw += length + 4;
#else
raw += length + 2;
#endif
rdataset->private5 = raw;
return (ISC_R_SUCCESS);
......@@ -314,7 +364,11 @@ rdataset_current(dns_rdataset_t *rdataset, dns_rdata_t *rdata) {
REQUIRE(raw != NULL);
r.length = raw[0] * 256 + raw[1];
#if DNS_RDATASET_FIXED
raw += 4;
#else
raw += 2;
#endif
r.base = raw;
dns_rdata_fromregion(rdata, rdataset->rdclass, rdataset->type, &r);
}
......@@ -390,12 +444,18 @@ dns_rdataslab_size(unsigned char *slab, unsigned int reservelen) {
current = slab + reservelen;
count = *current++ * 256;
count += *current++;
#if DNS_RDATASET_FIXED
current += (4 * count);
#endif
while (count > 0) {
count--;
length = *current++ * 256;
length += *current++;
#if DNS_RDATASET_FIXED
current += length + 2;
#else
current += length;
#endif
}
return ((unsigned int)(current - slab));
......@@ -417,7 +477,9 @@ rdata_from_slab(unsigned char **current,
region.length = *tcurrent++ * 256;
region.length += *tcurrent++;
#if DNS_RDATASET_FIXED
tcurrent += 2;
#endif
region.base = tcurrent;
tcurrent += region.length;
dns_rdata_fromregion(rdata, rdclass, type, &region);
......@@ -443,7 +505,9 @@ rdata_in_slab(unsigned char *slab, unsigned int reservelen,
count = *current++ * 256;
count += *current++;
#if DNS_RDATASET_FIXED
current += (4 * count);
#endif
for (i = 0; i < count; i++) {
rdata_from_slab(&current, rdclass, type, &trdata);
......@@ -473,11 +537,13 @@ dns_rdataslab_merge(unsigned char *oslab, unsigned char *nslab,
unsigned int oadded = 0;
unsigned int nadded = 0;
unsigned int nncount = 0;
#if DNS_RDATASET_FIXED
unsigned int oncount;
unsigned int norder = 0;
unsigned int oorder = 0;
unsigned char *offsetbase;
unsigned int *offsettable;
#endif
/*
* XXX Need parameter to allow "delete rdatasets in nslab" merge,
......@@ -490,15 +556,21 @@ dns_rdataslab_merge(unsigned char *oslab, unsigned char *nslab,
ocurrent = oslab + reservelen;
ocount = *ocurrent++ * 256;
ocount += *ocurrent++;
#if DNS_RDATASET_FIXED
ocurrent += (4 * ocount);
#endif
ostart = ocurrent;
ncurrent = nslab + reservelen;
ncount = *ncurrent++ * 256;
ncount += *ncurrent++;
#if DNS_RDATASET_FIXED
ncurrent += (4 * ncount);
#endif
INSIST(ocount > 0 && ncount > 0);
#if DNS_RDATASET_FIXED
oncount = ncount;
#endif
/*
* Yes, this is inefficient!
......@@ -511,8 +583,13 @@ dns_rdataslab_merge(unsigned char *oslab, unsigned char *nslab,
for (count = 0; count < ocount; count++) {
length = *ocurrent++ * 256;
length += *ocurrent++;
#if DNS_RDATASET_FIXED
olength += length + 8;
ocurrent += length + 2;
#else
olength += length + 2;
ocurrent += length;
#endif
}
/*
......@@ -528,7 +605,9 @@ dns_rdataslab_merge(unsigned char *oslab, unsigned char *nslab,
do {
nregion.length = *ncurrent++ * 256;
nregion.length += *ncurrent++;
ncurrent += 2;
#if DNS_RDATASET_FIXED
ncurrent += 2; /* Skip order. */
#endif
nregion.base = ncurrent;
dns_rdata_init(&nrdata);
dns_rdata_fromregion(&nrdata, rdclass, type, &nregion);
......@@ -537,7 +616,11 @@ dns_rdataslab_merge(unsigned char *oslab, unsigned char *nslab,
/*
* This rdata isn't in the old slab.
*/
#if DNS_RDATASET_FIXED
tlength += nregion.length + 8;
#else
tlength += nregion.length + 2;
#endif
tcount++;
nncount++;
added_something = ISC_TRUE;
......@@ -576,7 +659,9 @@ dns_rdataslab_merge(unsigned char *oslab, unsigned char *nslab,
return (ISC_R_NOMEMORY);
memcpy(tstart, nslab, reservelen);
tcurrent = tstart + reservelen;
#if DNS_RDATASET_FIXED
offsetbase = tcurrent;
#endif
/*
* Write the new count.
......@@ -584,6 +669,7 @@ dns_rdataslab_merge(unsigned char *oslab, unsigned char *nslab,
*tcurrent++ = (tcount & 0xff00) >> 8;
*tcurrent++ = (tcount & 0x00ff);
#if DNS_RDATASET_FIXED
/*
* Skip offset table.
*/
......@@ -596,25 +682,33 @@ dns_rdataslab_merge(unsigned char *oslab, unsigned char *nslab,
return (ISC_R_NOMEMORY);
}
memset(offsettable, 0, (ocount + oncount) * sizeof(unsigned int));
#endif
/*
* Merge the two slabs.
*/
ocurrent = ostart;
INSIST(ocount != 0);
#if DNS_RDATASET_FIXED
oorder = ocurrent[2] * 256 + ocurrent[3];
INSIST(oorder < ocount);
#endif
rdata_from_slab(&ocurrent, rdclass, type, &ordata);
ncurrent = nslab + reservelen + 2;
#if DNS_RDATASET_FIXED
ncurrent += (4 * oncount);
#endif
if (ncount > 0) {
do {
dns_rdata_reset(&nrdata);
#if DNS_RDATASET_FIXED
norder = ncurrent[2] * 256 + ncurrent[3];
INSIST(norder < oncount);
rdata_from_slab(&ncurrent, rdclass, type, &nrdata);
#endif
rdata_from_slab(&ncurrent, rdclass, type, &nrdata);
} while (rdata_in_slab(oslab, reservelen, rdclass,
type, &nrdata));
}
......@@ -628,36 +722,48 @@ dns_rdataslab_merge(unsigned char *oslab, unsigned char *nslab,
else
fromold = ISC_TF(compare_rdata(&ordata, &nrdata) < 0);
if (fromold) {
#if DNS_RDATASET_FIXED
offsettable[oorder] = tcurrent - offsetbase;
#endif
length = ordata.length;
*tcurrent++ = (length & 0xff00) >> 8;
*tcurrent++ = (length & 0x00ff);
#if DNS_RDATASET_FIXED
tcurrent += 2; /* fill in later */
#endif
memcpy(tcurrent, ordata.data, length);
tcurrent += length;
oadded++;
if (oadded < ocount) {
dns_rdata_reset(&ordata);
#if DNS_RDATASET_FIXED
oorder = ocurrent[2] * 256 + ocurrent[3];
INSIST(oorder < ocount);
rdata_from_slab(&ocurrent, rdclass, type,
#endif
rdata_from_slab(&ocurrent, rdclass, type,
&ordata);
}
} else {
#if DNS_RDATASET_FIXED
offsettable[ocount + norder] = tcurrent - offsetbase;
#endif
length = nrdata.length;
*tcurrent++ = (length & 0xff00) >> 8;
*tcurrent++ = (length & 0x00ff);
#if DNS_RDATASET_FIXED
tcurrent += 2; /* fill in later */
#endif
memcpy(tcurrent, nrdata.data, length);
tcurrent += length;
nadded++;
if (nadded < ncount) {
do {
dns_rdata_reset(&nrdata);
#if DNS_RDATASET_FIXED
norder = ncurrent[2] * 256 + ncurrent[3];
INSIST(norder < oncount);
rdata_from_slab(&ncurrent, rdclass,
#endif
rdata_from_slab(&ncurrent, rdclass,
type, &nrdata);
} while (rdata_in_slab(oslab, reservelen,
rdclass, type,
......@@ -666,10 +772,12 @@ dns_rdataslab_merge(unsigned char *oslab, unsigned char *nslab,
}
}
#if DNS_RDATASET_FIXED
fillin_offsets(offsetbase, offsettable, ocount + oncount);
isc_mem_put(mctx, offsettable,
(ocount + oncount) * sizeof(unsigned int));
#endif
INSIST(tcurrent == tstart + tlength);
......@@ -688,8 +796,10 @@ dns_rdataslab_subtract(unsigned char *mslab, unsigned char *sslab,
unsigned int mcount, scount, rcount ,count, tlength, tcount, i;
dns_rdata_t srdata = DNS_RDATA_INIT;
dns_rdata_t mrdata = DNS_RDATA_INIT;
#if DNS_RDATASET_FIXED
unsigned char *offsetbase;
unsigned int *offsettable;
#endif
unsigned int order;
REQUIRE(tslabp != NULL && *tslabp == NULL);
......@@ -714,8 +824,10 @@ dns_rdataslab_subtract(unsigned char *mslab, unsigned char *sslab,
tcount = 0;
rcount = 0;
#if DNS_RDATASET_FIXED
mcurrent += 4 * mcount;
scurrent += 4 * scount;
#endif
sstart = scurrent;
/*
......@@ -744,11 +856,13 @@ dns_rdataslab_subtract(unsigned char *mslab, unsigned char *sslab,
dns_rdata_reset(&mrdata);
}
#if DNS_RDATASET_FIXED
tlength += (4 * tcount);
#endif
/*
* Check that all the records originally existed. The numeric
* check only works as rdataslabs do not contain duplicates.
* check only works as rdataslabs do not contain duplicates.
*/
if (((flags & DNS_RDATASLAB_EXACT) != 0) && (rcount != scount))
return (DNS_R_NOTEXACT);
......@@ -773,6 +887,7 @@ dns_rdataslab_subtract(unsigned char *mslab, unsigned char *sslab,
return (ISC_R_NOMEMORY);
memcpy(tstart, mslab, reservelen);
tcurrent = tstart + reservelen;
#if DNS_RDATASET_FIXED
offsetbase = tcurrent;
offsettable = isc_mem_get(mctx, mcount * sizeof(unsigned int));
......@@ -781,6 +896,7 @@ dns_rdataslab_subtract(unsigned char *mslab, unsigned char *sslab,
return (ISC_R_NOMEMORY);
}
memset(offsettable, 0, mcount * sizeof(unsigned int));
#endif
/*
* Write the new count.
......@@ -788,7 +904,9 @@ dns_rdataslab_subtract(unsigned char *mslab, unsigned char *sslab,
*tcurrent++ = (tcount & 0xff00) >> 8;
*tcurrent++ = (tcount & 0x00ff);
#if DNS_RDATASET_FIXED
tcurrent += (4 * tcount);
#endif
/*
* Copy the parts of mslab not in sslab.
......@@ -796,11 +914,15 @@ dns_rdataslab_subtract(unsigned char *mslab, unsigned char *sslab,
mcurrent = mslab + reservelen;
mcount = *mcurrent++ * 256;